The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 447
g reproducer is a telephone receiverwith large magnets haying windings of low resistance. In onetypo of American Loud-speaking reproducer the windings of thelarge magnet have a resistance of about two or three ohms. Inthis same type the armature is a small coil of fine wire in theshape of a ring,… … STEP DOWN COIL PRIMARY SWITCH
Telegraph, Wireless · Radio
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